Re: 18 inch All Terrains -
I went with the Hankook Dynapro ATM RF10 on my 2014 Limited with 18" wheels. The original size was 265/60R18, which I kept.
One thing to double check is your spare. The spare is sized to the same circumference as your original tires. If the new tires are a different circumference, then you should find a matching spare.
2014 Jeep Grand Cherokee Limited 4x4 3.6L v6 Billet Silver with Black leather interior (new)
2003 Nissan Murano SE AWD 3.5L v6 Sunlit Copper with Black leather interior (new)
1995 Ford Mustang 3.8L v6 Automatic Silver with Red cloth interior (used)
1986 Mercury Lynx 1.9L 4cyl Manual 3-door Hatchback white with grey cloth interior (used)